<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="科目" prop="subjects">
        <el-select v-model="queryParams.subjects" placeholder="请选择科目" clearable>
          <el-option v-for="dict in dict.type.question_subjects" :key="dict.value" :label="dict.label"
            :value="dict.value" :type="dict.listClass">
          </el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="题目难度" prop="level">
        <el-select v-model="queryParams.level" placeholder="请选择题目难度" clearable>
          <el-option v-for="dict in dict.type.question_levels" :key="dict.value" :label="dict.label" :value="dict.value"
            :type="dict.listClass">
          </el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="题目类型" prop="type">
        <el-select v-model="queryParams.type" placeholder="请选择题目类型" clearable>
          <el-option v-for="dict in dict.type.question_types" :key="dict.value" :label="dict.label" :value="dict.value"
            :type="dict.listClass">
          </el-option>
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button type="primary" plain icon="el-icon-plus" size="mini" @click="handleAdd"
          v-hasPermi="['system:bank:add']">新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="success" plain icon="el-icon-edit" size="mini" :disabled="single" @click="handleUpdate"
          v-hasPermi="['system:bank:edit']">修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="danger" plain icon="el-icon-delete" size="mini" :disabled="multiple" @click="handleDelete"
          v-hasPermi="['system:bank:remove']">删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="warning" plain icon="el-icon-download" size="mini" @click="handleExport"
          v-hasPermi="['system:bank:export']">导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="bankList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="题目ID" align="center" prop="seqId" />
      <el-table-column label="科目" align="center" prop="subjects" />
      <el-table-column label="难度" align="center" prop="level" />
      <el-table-column label="类型" align="center" prop="type" />
      <el-table-column label="问题章节" align="center" prop="chapter" />
      <el-table-column label="问题内容" align="center" prop="question" />
      <el-table-column label="选择题答案 json" align="center" prop="chooseAnswe" />
      <el-table-column label="正确答案" align="center" prop="answer" />
      <el-table-column label="备注" align="center" prop="remark" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button size="mini" type="text" icon="el-icon-edit" @click="handleUpdate(scope.row)"
            v-hasPermi="['system:bank:edit']">修改</el-button>
          <el-button size="mini" type="text" icon="el-icon-delete" @click="handleDelete(scope.row)"
            v-hasPermi="['system:bank:remove']">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination v-show="total>0" :total="total" :page.sync="queryParams.pageNum" :limit.sync="queryParams.pageSize"
      @pagination="getList" />

    <!-- 添加或修改题目对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="800px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">

        <el-form-item label="科目" prop="subjects">
          <el-select v-model="form.subjects" placeholder="请选择科目" clearable>
            <el-option v-for="dict in dict.type.question_subjects" :key="dict.value" :label="dict.label"
              :value="dict.value" :type="dict.listClass">
            </el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="题目类型" prop="level">
          <el-select v-model="form.type" placeholder="请选择题目类型" clearable>
            <el-option v-for="dict in dict.type.question_types" :key="dict.value" :label="dict.label"
              :value="dict.value" :type="dict.listClass">
            </el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="题目难度" prop="type">
          <el-select v-model="form.level" placeholder="请选择题目难度" clearable>
            <el-option v-for="dict in dict.type.question_levels" :key="dict.value" :label="dict.label"
              :value="dict.value" :type="dict.listClass">
            </el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="所属章节" prop="chapter">
          <el-input v-model="form.chapter" type="textarea" placeholder="请输入内容" />
        </el-form-item>
        <el-form-item label="问题内容" prop="question">
          <el-input v-model="form.question" type="textarea" placeholder="请输入内容" />
        </el-form-item>
        <div v-if="form.type=='选择题'">
          <el-form-item v-for="(chooseAnswe,index) in form.chooseAnsweList" :label="'选项' + chooseAnswe.key"
            :key="chooseAnswe.key" :prop="'chooseAnsweList.' + index + '.value'" 
            :rules="{ required: true, message: '内容不能为空', trigger: 'blur' }">
            <el-row>
              <el-col :span="20">
                <el-input v-model="chooseAnswe.value"></el-input>
              </el-col>
              <el-col :span="2" v-if="form.chooseAnsweList.length-1==index">
                <el-button @click.prevent="addDomain(index+1)">新增</el-button>
              </el-col>
              <el-col :span="2">
                <el-button type="danger" @click.prevent="removeDomain(chooseAnswe)">删除</el-button>
              </el-col>
            </el-row>
          </el-form-item>
        </div>
        <el-form-item label="正确答案" prop="answer">
          <el-input v-model="form.answer" type="textarea" placeholder="请输入内容" />
        </el-form-item>
        <el-form-item label="备注" prop="remark">
          <el-input v-model="form.remark" type="textarea" placeholder="请输入内容" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listBank, getBank, delBank, addBank, updateBank } from "@/api/system/bank";

export default {
  name: "Question",
  dicts: ['question_subjects', 'question_levels', 'question_types'],
  data() {
    return {
      //选项序列
      chooseIndex: ['A', 'B', 'C', 'D', 'E', 'F', 'G'],
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 题目表格数据
      bankList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        subjects: null,
        level: null,
        type: null,
        chapter: null,
        question: null,
        chooseAnswe: null,
        answer: null,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    /** 查询题目列表 */
    getList() {
      this.loading = true;
      listBank(this.queryParams).then(response => {
        this.bankList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        seqId: null,
        subjects: null,
        level: null,
        type: null,
        chapter: null,
        question: null,
        chooseAnswe: null,
        answer: null,
        delFlag: null,
        createBy: null,
        createTime: null,
        updateBy: null,
        updateTime: null,
        remark: null,
        chooseAnsweList: [
          { key: this.chooseIndex[0], value: null }
        ]
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.seqId)
      this.single = selection.length !== 1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加题目";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const seqId = row.seqId || this.ids
      getBank(seqId).then(response => {
        this.form = Object.assign(this.form,response.data);
        if(this.form.chooseAnswe){
          this.form.chooseAnsweList=JSON.parse(this.form.chooseAnswe)
        }
        this.open = true;
        this.title = "修改题目";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.seqId != null) {
            this.form.chooseAnswe=JSON.stringify(this.form.chooseAnsweList)
            updateBank(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            this.form.chooseAnswe=JSON.stringify(this.form.chooseAnsweList)
            addBank(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const seqIds = row.seqId || this.ids;
      this.$modal.confirm('是否确认删除题目编号为"' + seqIds + '"的数据项？').then(function () {
        return delBank(seqIds);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => { });
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('system/bank/export', {
        ...this.queryParams
      }, `bank_${new Date().getTime()}.xlsx`)
    },
    removeDomain(item) {
      var index = this.form.chooseAnsweList.indexOf(item)
      if (index !== 0) {
        this.form.chooseAnsweList.splice(index, 1)
      }
    },
    addDomain(index) {
      this.form.chooseAnsweList.push({
        value: '',
        key: this.chooseIndex[index]
      });
    }
  }
};
</script>
